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Scientific American, Vol. 64, No. 14 (April 1891) (1891)
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■c^rOfl. bIO-j^ te^s^ ^1-ri-T^ 111! FTTTTTTTTTTTTT',^^TTTTT''^y HH ■B -cr<j?^>->3- T I'nlX3 [Entered at the Post Office of New York, N. Y., as Second Class Matter. Oopyrishtcd, 1891. by Mnnn & Co.] A WEEKLY JOURNAL OF PRACTICAL INFORMATION, ART, SCIENCE, MECHANICS, CHEMISTRY, AND MANUFACTURES.… … / tsG@>& ■ < •• -~ C. E. MITCHELL, COMMISSIONER OF PATENTS. ,tff» "*»«** **»** **°«Zss^, ^ag KJr. ' * 4-8«y »0* JOHN W, BABSON, CHIEF OF ISSUE, V. S. PATENT OFFICE. CELEBRATION OF THE BEGINNING OF THE SECOND CENTURY OF THE AMERICAN PATENT SYSTEM.-[See page 213.] ©1891 SCIENTIFIC AMERICAN, INC.Patents · Adapted · Munn · Scientific American · Device · Reduction company · Express money · Horse power · American supplement · Trade mark · American patent · Pittsburg reduction · Pure aluminum · Assistant secretary
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